package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;

    @Override
    public void remove(Long id) {
        //1根据分类id 去菜品表查询 相关菜品的数量
        LambdaQueryWrapper<Dish> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(Dish::getCategoryId, id);
        int count = dishService.count(wrapper);
        if (count > 0) {
            throw new CustomException("当前分类有相关菜品,不能删除");
        }
        //2根据分类id 去套餐表查询 相关套餐的数量
        LambdaQueryWrapper<Setmeal> wrapper1 = new LambdaQueryWrapper<>();
        wrapper1.eq(Setmeal::getCategoryId, id);
        int count1 = setmealService.count(wrapper1);
        if (count1 > 0) {
            throw new CustomException("当前分类有相关菜品,不能删除");
        }
        //3如果没有错 也就是 套餐和菜品没有关联 就能删除
        this.removeById(id);
    }
}
